tor-browser

The Tor Browser
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if-decl-else-decl-b-global-skip-early-err-try.js (2167B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/annex-b-fns/global-skip-early-err-try.case
      3 // - src/annex-b-fns/global/if-decl-else-decl-b.template
      4 /*---
      5 description: Extension is observed when creation of variable binding would not produce an early error (try statement) (IfStatement with a declaration in both statement positions in the global scope)
      6 esid: sec-functiondeclarations-in-ifstatement-statement-clauses
      7 flags: [generated, noStrict]
      8 info: |
      9    The following rules for IfStatement augment those in 13.6:
     10 
     11    IfStatement[Yield, Return]:
     12        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else Statement[?Yield, ?Return]
     13        if ( Expression[In, ?Yield] ) Statement[?Yield, ?Return] else FunctionDeclaration[?Yield]
     14        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else FunctionDeclaration[?Yield]
     15        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield]
     16 
     17 
     18    B.3.3.2 Changes to GlobalDeclarationInstantiation
     19 
     20    [...]
     21    b. If replacing the FunctionDeclaration f with a VariableStatement that has
     22       F as a BindingIdentifier would not produce any Early Errors for script,
     23       then
     24    [...]
     25 
     26    B.3.5 VariableStatements in Catch Blocks
     27 
     28    [...]
     29    - It is a Syntax Error if any element of the BoundNames of CatchParameter
     30      also occurs in the VarDeclaredNames of Block unless CatchParameter is
     31      CatchParameter:BindingIdentifier and that element is only bound by a
     32      VariableStatement, the VariableDeclarationList of a for statement, or the
     33      ForBinding of a for-in statement.
     34 ---*/
     35 assert.throws(ReferenceError, function() {
     36  f;
     37 }, 'An initialized binding is not created prior to evaluation');
     38 assert.sameValue(
     39  typeof f,
     40  'undefined',
     41  'An uninitialized binding is not created prior to evaluation'
     42 );
     43 
     44 try {
     45  throw {};
     46 } catch ({ f }) {
     47 
     48 if (false) function _f() {} else function f() {  }
     49 
     50 }
     51 
     52 assert.throws(ReferenceError, function() {
     53  f;
     54 }, 'An initialized binding is not created following evaluation');
     55 assert.sameValue(
     56  typeof f,
     57  'undefined',
     58  'An uninitialized binding is not created following evaluation'
     59 );
     60 
     61 reportCompare(0, 0);